You radiate awesomeness, competence, skill, and success.

It has been well-maintained overall, but has not been updated (knob and tube wiring, radiator heat, no central air, plaster walls).

I caught them lying about having moved in after they stated they did and started putting in 'service requests' for minor things that they could of easily done on their own (Removing an air-conditioning unit - changing the dial of a radiator, etc).   

YMMV (your mileage may vary)Fixable alone: boiler maintenance and steam system rebalancing, minor lead paint sealing, plaster patching (even very large ones), thermostat installation, insulate flooring and rim joists, painting, floor repair, skim coating walls, installing thresholds, weatherproofing, installing/refinishing door and cabinet hardware, adjuster gutter drainageNeeded professionals: sewage main unclogging ($), knob and tube disconnection+removal ($$), flooring ($$), adding joists for structural support within walls ($$), replacement and removal of old brass/cast iron plumbing where necessary ($$$), new gas line for laundry and lines for appliances ($), wall demo + replacement ($$$), steam line moving and radiator repair ($$), gutters ($$)$ - hundreds, $$ - thousands, $$$ 5K-10K, $$$$ - tens of thousandsHope this helps, best of luck with the old home!

I'm planning on purchasing a 3/4-unit in the near future and wanted to gut check my utility estimates for my analyses, specifically for steam radiator heating.

There's a crack in the microwave door, and the tenant is worried about radiation leaking out.

Having asbestos in your house is not like radiation where you get contaminated by near proximity.  

We had been going to hotel Lorraine to pay rent and supposedly pay rental ins that later found out after all of our belongings were destroyed due to them not paying gas or water and it blowing all of the radiators in the entire place.

And would not work on radiator piping or radiant floor heat piping. 

Also check if there is an issue with certain breeds with your insurance company.Having just finished cleaning dog hair from all the baseboard radiator fins in every room in our soon to be rental I am very much in favor or a non-refundable cleaning fee for pets.We are debating pets at the moment for this house as it is the right kind of location for it and has a big backyard but I am not offering it in the ad.